题目内容

成型纵梁的主要技术要求正确的是

A. 长度偏差正公差不超过5mm
B. 幅面纵向直线度公差不超过全长的0.4%,每1米内的偏差不大于2mm
C. 翼面纵向直线度公差不超过全长的0.1%
D. 纵梁内侧圆角半径R的偏差为±2mm

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